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Figure 1

Flow diagram
Flow diagram

Figure 2

Requested and given PCA morphine over the study period, by group. Key: PCA, patient-controlled analgesia.
Requested and given PCA morphine over the study period, by group. Key: PCA, patient-controlled analgesia.

Figure 3

VAS at rest and VAS at movement over the study period, by group. Key: VAS, visual analog scale.
VAS at rest and VAS at movement over the study period, by group. Key: VAS, visual analog scale.

Figure 4

Mean arterial pressure and heart rate over the study period, by group
Mean arterial pressure and heart rate over the study period, by group

Intraoperative and postoperative morphine administration and PCA morphine pump initiation, by group

Morphine administrationStudy groupp Value
Ketamine group (n = 21)Tramadol group (n = 21)
Intraoperative (bolus, mg)16.614 (5.22)15.79 (4.59)0.59
PACU (bolus, mg)4 [0–6]2 [0–4]0.341
Ward (bolus, mg)0 [0–0]0 [0–0]0.146
Time to PCA morphine pump start from tramadol/ketamine pump start (minutes)95.62 (46.14)87.24 (44.81)0.554
PCA administration (mg)54.524 (20.846)28.905 (16.504)<0.001
Total morphine (mg)60.714 (20.03)32.428 (18.17)<0.001

Side effects related to analgesia protocol, by group

Study groupp Value
Ketamine group (n = 21)Tramadol group (n = 21)
Sedation (1, awake; 2, medium sedation/wakes up easily; 3, mostly sedated does not wake up easily; 4, unarousable)
1st hour (1/2/3)3 (14.29%)/14 (66.67%)/4 (19.05%)1 (4.76%)/13 (61.9%)/7 (33.33%)0.408
2nd hour (1/2/3)3 (14.29%)/15 (71.43%)/3 (14.29%)4 (19.05%)/12 (57.14%)/5 (23.81%)0.671
4th hour (1/2/3)5 (23.81%)/15 (71.43%)/1 (4.76%)7 (33.33%)/12 (57.14%)/2 (9.52%)0.616
6th hour (1/2)12 (57.14%)/9 (42.86%)12 (57.14%)/9 (42.86%)0.999
12th hour (1/2)16 (76.19%)/5 (23.81%)13 (61.9%)/8 (38.1%)0.505
18th hour (1/2)16 (76.19%)/5 (23.81%)17 (80.95%)/4 (19.05%)0.999
24th hour (1/2)18 (85.71%)/3 (14.29%)18 (85.71%)/3 (14.29%)0.999
36th hour (1/2)18 (85.71%)/3 (14.29%)19 (90.48%)/2 (9.52%)0.999
48th hour (1/2/3)20 (95.24%)/1 (4.76%)/−18 (85.71%)/2 (9.52%)/1 (4.76%)0.606
PONV (0, none; 1, nausea; 2, less than three episodes of vomiting; 3: more than three episodes of vomiting)
1st day (0/1/2)17 (80.95%)/2 (9.52%)/2 (9.52%)17 (80.95%)/2 (9.52%)/2 (9.52%)0.999
2nd day (0/2)19 (90.48%)/2 (9.52%)18 (85.71%)/3 (14.29%)0.999
Other side effects
Pruritus (no/yes)19 (90.48%)/2 (9.52%)18 (85.71%)/3 (14.29%)0.999
Hallucinations (no/yes)15 (71.43%)/6 (28.57%)20 (95.24%)/1 (4.76%)0.093
Confusion (no/yes)19 (90.48%)/2 (9.52%)21 (100%)/−0.488
Seizures (no/yes)21 (100%)/−21 (100%)/−-
Dry mouth (no/yes)12 (57.14%)/9 (42.86%)19 (90.48%)/2 (9.52%)0.032
Bradycardia (no/yes)21 (100%)/−21 (100%)/−-
Uterine retention (no/yes)21 (100%)/−21 (100%)/−-
Hypotension (no/yes)21 (100%)/−20 (95.24%)/1 (4.76%)0.999

Somatometric and intraoperative data of the study population, by group

Study groupp Value
Ketamine group (n = 21)Tramadol group (n = 21)
Somatometric characteristics of the study group
Age (years)57 [50–60]62 [56–66]0.058
Gender (female vs male)11 (52.38%) versus 10 (47.62%)8 (38.1%) versus 13 (61.9%)0.268
BMI (kg/m2)23.38 (2.78)25 (3.37)0.097
Intraoperative data
Type of surgery
Pancreatectomy2 (9.52%)6 (28.57%)0.175
Whipple5 (23.81%)8 (38.1%)
Cholopeptic anastomosis2 (9.52%)-
Hepatectomy6 (28.57%)5 (23.81%)
Gastrectomy6 (28.57%)2 (9.52%)
Duration of surgery (minutes)155 [120–190]159 [115–185]0.899
eISSN:
2502-0307
Language:
English
Publication timeframe:
2 times per year
Journal Subjects:
Medicine, Clinical Medicine, other, Surgery, Anaesthesiology, Emergency Medicine and Intensive-Care Medicine